Histogram of minimum heliocentric distances. Distances were divided into two subsets. The green bars correspond to the encounters from the past, the blue bars depict the minimum distances of approaches that will occur in the future. A total of 642 stars with minimum distances of less than 4.0 pc were considered.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.